baber/WOPTO huggingface dataset:
Patent GB-102812-A (GB)
Title: Improvements in or relating to Hand or Rifle Grenades or Bombs.
Inventor: BARTLEET BRYAN DOUGLAS
IPC: F42B30/04
Filed: 1916-01-03
Abstract: 102,812. Bartleet, B. D., and Millership, A. J. W. Jan. 3, 1916. Projectiles; projectile fuses.-Consists in a hand or rifle grenade comprising a case with a removable plug carrying a striker, and a bursting-charge contained in a cartridge provided with a percussion cap so that it can be carried separately and readily inserted in the case when the projectile is required for use. In the grenade shown in Fig. 2, the bursting-charge is an ordinary rifle cartridge k which can be easily inserted into the elongated body a when a plug c, secured by a screw-thread or the equivalent in the enlarged upper end of the chamber, has been temporarily removed. The plug carries a spring-controlled striker d adapted to fire the cap of the cartridge when it is driven in on impact. A larger cartridge filled with high explosives may be used.. In the form shown in Fig. 4, the charge is fired by a time-fuse n which is adapted to be ignited by striking the head of the pin d<1> before the grenade is thrown; or a spring-actuated striker normally held out of notion by a lever may be used. The grenade may be constructed so as to hold several cartridges adapted to be exploded simultaneously. Guiding-streamers, or a handle secured in a socket at the end of the casing, may be provided. The Provisional Specification also states that the grenade case may be charged with chemicals for producing noxious gas, which is liberated when the projectile bursts.
Patent IS-6330-A (IS)
Inventor: WOBBEN ALOYS
IPC: F03B17/06
Filed: 2002-04-04
Abstract: The invention relates to a transportable power station which uses ocean currents. The hollow housing and rotor of said power station can be felt with water or emptied as required. The immersion depth of the inventive installation can therefore be regulated or modified.
Patent JP-S60144709-A (JP)
Title: Production for strengthened flat optical cable
Inventor: ONO TETSUHARU
IPC: G02B6/44
Filed: 1984-01-05
Abstract: PURPOSE:To produce a strengthened flat optical cable, which has a high strength in the transverse direction, with a good productivity by holding plural optical fibers in parallel between two fiber-reinforced tapes which are formed preliminarily in the tape half-hardening state and sticking these two fiber-reinforced tapes to each other and hardening them completely. CONSTITUTION:Fiber-refinforced tapes 1 are led to preheating heaters 5 from both of the upper side and the lower side by guide rollers 4 and are superposed. Simultaneously, plural optical fibers 6 are led in parallel by arranging guides 7 and are inserted between upper and lower fiber-reinforced tapes 1. At this time, fiber-reinforced tapes 1 are preheated by preheating heaters 5 and can be welded. Fiber-reinforced tapes 1 are sent to a forming device 8 while interposing optical fibers 6 in parallel between them and are press-fitted to each other by heating. Thereafter, optical fibers and fiber-reinforced tapes 1 joined into one body are sent to a complete hardening device 9, and a strengthening plastic coating layer 11 is hardened completely to produce a strengthened flat optical cable 10, and this cable is wound up while being cooled.
Patent DK-17091-A (DK)
Inventor: WILLIAMS ROBERT LINDSAY
IPC: C12N5/06
Filed: 1991-01-31
Abstract: PCT No. PCT/AU89/00330 Sec. 371 Date May 31, 1990 Sec. 102(e) Date May 31, 1990 PCT Filed Aug. 3, 1989 PCT Pub. No. WO90/01541 PCT Pub. Date Feb. 22, 1990.The present invention relates generally to the use of leukaemia inhibitory factor (LIF) in the maintenance and derivation of embryonic stem (ES) cells in culture. The ES cells are maintained and/or derived from animal embryos by culturing said cells or embryos in a culture medium containing an effective amount of LIF for a time and under conditions sufficient to maintain and/or derive said ES cells. The ES cells may be passaged in LIF and used to make chimaeric animals.
Patent DK-63285-A (DK)
Inventor: ASZODI JOZSEF
IPC: C07D513/04
Filed: 1985-02-12
Abstract: The following 1-dethia-2-thia-cephem cpds., within the scope of formula (I) of the parent patent, their internal salts and acid addn. salts are new: (1) 5-A-2-CF3-thiazolo (4,5-c)pyridinium (6S,7S,Z); A = (3-(7-(((2-amino-4-thiazolyl) (methoxyimino)acetyl) amino)-2-carboxy-8-oxo-4-thia-1- aza-bicyclo(4,2,0) -oct-2-en-3-yl)-2(E)-propenyl; (2) 7-(((2-amino-4-thiazolyl)(methoxy imino)acetyl)amino)-3-(3-(1,4-dihydro-3-formylamino -4-oxo-1-pyridyl)-1 (E).propenyl)8-oxo-4-thia -1-azabicyclo(4,2,O) -oct-2-ene-2-carboxylic acid (6S,7S,Z); (3) 5-8-thieno(3,2-c)pyridin ium (6S,7S, Z); B is as A but difluromethoxyimino replaces methoxyimino; (4) 5-B-4-methyl-thieno (3,2-c)pyridinium (6S,7S,Z); (5) 5-C-thiazolo (4,5-c)pyridinium(6S,7S, Z); C is as A but fluoromethoxyimino replaces methoxyimino; (6) 5-C-4-methyl-thieno (3,2-c)pyridinium (6S,7S,Z); (7) 5-C-thieno(3,2-c)pyridinium (6S,7S,Z); (8) 5-A-thiazolo (4,5-c)pyridinium(6S,7S, Z); (9) 5-A-2-methyl -1H-imidazolo(4,5-c) pyridinium(6S,7S,syn); (10) 5-A-2-phenyl-oxazolo(4,5-c) pyridinium(6S,7S,syn); (11) 5-A-2-ethyl-thiazolo(4,5-c) pyridinium(6S,7S,syn); (12) 5-B-thiazolo(4,5-c)pyridinium(6S, 7S,syn); (13) 2-amino-5-B-thiazolo(4,5-c) pyridinium(6S,7S,syn); (14) 7-c-thieno(2,3-b)pyridinium; (15) 1-A-1-(2-(5-nitro -1H-imidazol-1-yl) ethyl)pyrrolidinium(6S,7S,Z); (16) 7-(3-(7-(((5-amino -1,2,4-thiadiazol -3-yl)(methoxyimino)acetyl) amino)-2-carboxy-8-oxo -4-thia-1-azabi cyclo(4,2,0)oct-2 -en-3-yl)-2(E) - propenyl)thieno(2,3-b) pyridinium(6S,7S,syn); (17) (2,2-dimethyl -1-oxopropoxy)methyl 7-(((2-amino-thiazol-4-yl) (methoxyimino)acetyl) amino)-8-oxo-3-(3- ((1,3,4-thiadiazol-2-yl) thio)-1(E)-propenyl) -4-thia-1-azabi cyclo-(4,2,O) oct-2-en-2-carboxylate. -
Patent EG-19211-A (EG)
Title: Easy grip bottle
Inventor: ZOGG JON
IPC: B65D1/44
Filed: 1991-06-05
Granted: 1994-11-30
Abstract: for gripping and manipulating the bottle. The indentation are designed to provide for the same gripping feel whether gripped front or the back. The indentations are also designed to accept a thumb and one to four fingers. The positive gripping with the same grip feel allows the bottle to be used in either hand. This decreases the number of times that a bottle must be handled during use. It also decreases the likelihood that the bottle will be dropped while being handled. <IMAGE>
Patent EG-17061-A (EG)
Title: Process for preparing 4-hydroxycoumarin derivatives
IPC: A01N43/16
Filed: 1985-09-24
Granted: 1993-02-28
Abstract: The invention provides a process for preparing a 4-hydroxycoumarin derivative having anti-coagulant properties, useful as a rodenticide, of formula <CHEM> wherein R<1> and R<2> are independently selected from the group consisting of hydrogen, halogen, alkyl of up to 6 carbon atoms and alkoxy of up to 6 carbon atoms, and R<3> represents a group selected from <CHEM> where X represents a halogen atom or a group C1 12 alkyl, C1 12 alkoxy, C3-8 cycloalkyl, CN, SO2R<5>, CF3, OCF3, COOR<5> or COR<5>, where R<5> is C1 6 alkyl, n min  is 0, 1 or 2 and Y is a fluorine or chlorine atom; <CHEM> where n min  and Y are as defined above, X is as defined above or is hydrogen, n sec  is 0 or 1 and D is an oxygen atom or a group -O-(CH2)m-, -(CH2)m-O-, -O-(CH2)m -O-(CH2)p-, -(CH2)-m, or -CH=CH-, or a sulphur ana logue thereof, wherein m is in the range 1 to 6 and p is in the range 1 to 6; <CHEM>  where X, n min  and Y are as defined in (a) above.  (d) a group selected from <CHEM>  and <CHEM>  and  (e) a group selected from <CHEM> where X and n sec  are defined as in (b) above, A is an oxygen or sulphur atom and D min  is an oxygen atom or a -CH2- group, which process comprises condensing 4-hydroxycoumarin with a compound of formula <CHEM> or the corresponding 1,2-dihydronaphthalene, wherein R<1>, R<2> and R<3> are as defined above, and L is a hydroxy group or a halogen aotm, in the presence of an organic solvent and a catalyst characterised in that the solvent is selected from formic acid, a mixture of formic acid and at least one C2-6 aliphatic acid having a boiling temperature at atmospheric pressure in the range 60 DEG C to 105 DEG C and a liquid halogenated hydrocarbon having a boiling temperature of at least 60 DEG C, and reaction is effected at a temperature in the range 60 DEG C to the reflux temperature of the reaction mixture.
Patent GB-1323191-A (GB)
Title: Pyrrolidinylacetic acid esters
IPC: C07D207/08
Filed: 1971-01-01
Abstract: 1323191 Pyrrolidinylacetic acid esters CIBAGEIGY AG 1 Jan 1971 [15 Jan 1970 26 Nov 1970] 114/71 Heading C2C Novel compounds I in which R is 1-6 C alkyl, 2-6 C alkenyl, cycloalkyl or cycloalkylalkyl; Ph is optionally substituted phenyl; and A is a 2-pyrrolidinyl radical which is optionally substituted by 1-6 C alkyl or alkoxy or N-(1-6 C alkyl) or N-(2-6 C alkenyl) substituted are prepared by (1) reduction of the double bond of compounds II in which A<SP>1</SP> is a doubly bonded radical corresponding to A, or a tautomer thereof in which the double bond lies in the heterocyclic ring or (2) by conventional modification of the group X in compounds III in which X is a free or reactively modified carboxyl group different from COOR. 2 - [α - Carbomethoxy - benzylidene] - pyrrolidine is prepared by reaction of 2-thiopyrrolidone with α-bromophenylacetic acid methyl ester to give 2 - [α - carbomethoxybenzylmercapto]-4,5- dihydro-3H-pyrrole which is then reacted with trimethyl phosphite. Threo - α - phenyl - α - (2 - pyrrolidinyl) - acetic acid is prepared by alkaline hydrolysis of the diastereomer mixture of the methyl ester.  2 - [α - (Carbo - t - butoxy - p - methoxy - benzylidene]-pyrrolidine is prepared by reaction of 2- thiopyrrolidone with α - bromo - p methoxyphenylacetic acid t-butyl ester to give 2-[α- (carbo - t - butoxy) - p - methoxybenzylmercapto]- 4,5-dihydro-3H-pyrrole followed by reaction of the latter with triethyl phosphite. 2-(α-Carbomethoxy - p - methoxybenzylidene) - 3S,4S - dimethoxypyrrolidine is prepared similarly via 3R,4S - dimethoxy - 2 - (α - carbomethoxy - pmethoxybenzylmercapto) - 4,5 - dihydro - 3H- pyrrole Pharmaceutical compositions for enteral or parenteral administration as central stimulating drugs comprise a compound I together with a suitable excipient.
Patent GB-1220231-A (GB)
Title: Improvements in magnetic cores
Inventor: BENTLEY HUGH
IPC: H01F27/25
Filed: 1968-01-01
Abstract: 1,220,231. Transformers. TELCON-MAGNETIC CORES Ltd. 31 Dec., 1968 [1 Jan., 1968], No. 129/68. Addition to 1,173,447. Heading H1T. The invention claimed in the parent Specification is modified, to aid fitting together of the parts, in that alternate limbs 6, 8, 10, 12, 14 and 16 of the zig-zag pattern diverge with respect to the planes of the laminations and the remaining limbs 7, 9, 11, 13 and 15 lie in the planes, and also in that each diverging limb is constituted by the ends of at least five laminations.
Patent GB-1471101-A (GB)
Title: Polyisocyanate-trimerisation catalyst
IPC: C08G18/00
Filed: 1975-01-03
Abstract: 1471101 Polymerisation catalyst UPJOHN CO 3 Jan 1975 [30 Jan 1974] 250/75 Heading B1E [Also in Divisions B5, C2 and C3] A catalyst composition for the trimerisation of a polyisocyanate and of use in the formation of cellular isocyanurate polymers comprises (a) 33 to 67 mole % of an amide salt of formula wherein: M is Li, Na or K; R 1 , R 2  and R 3  are H, C 1 -C 8  alkyl, aryl, aralkyl or cycloalkyl; R 4  is C 1 -C 8  alkyl or aryl, and (b) 33 to 67 mole % of a glycine salt of formula wherein: M is Li, Na or K; R 5  is H or C 1 -C 12  alkyl; R 6  is H, C 1 -C 12  alkyl or CH 2 COOM; and R 7  is H or CH 2 N(R 6 )CH 2 COOM. The composition may further comprise a tertiary amine isocyanate-trimerisation catalyst in an amount of 1 to 50% wt based on the total of components (a) and (b). Component (a) may be potassium N-phenyl-2-ethylhexamide and component (b) may be sodium N-(2-hydroxy- 5-nonylphenyl)-methyl-N-methylglycinate. The amide salt and glycine salts may be used as solutions in diluents, e.g. a mixture of ethylene glycol and dimethylformamide. The tertiary amine may be N, N-dimethyl-ethanolamine, -benzylamine or -cyclohexylamine; N, N, N', N'-tetramethyl-1, 3-butanediamine or -propanediamine; N-methylmorpholine or N-ethylmorpholine.
Patent GB-1490850-A (GB)
Title: Electronic network analyzer
IPC: G01R25/00
Filed: 1974-09-24
Abstract: 1490850 Network analyzer HEWLETTPACKARD CO 24 Sept 1974 [23 Nov 1973]  00261/77 Divided out of 1490849 Heading G1U A two-channel A.C. network analyzer suitable for the measurement of the characteristics of a network or a device 18 e.g. phase or group delay comprises frequency converters 26, 28 for converting a test signal derived from 18 and a reference signal at 12 to the same I.F. frequency, an arrangement 36 for measuring the relative value of a given parameter, e.g. amplitude or phase, of the two I.F. signals and a variable electronic phase shifter 24 for shifting the phase of the reference I.F. and for ensuring a zero phase offset between the two I.F. signals at the inputs of 36. A sweep oscillator 16 feeding the two channels, a local oscillator 30 and the phase-shifter 24 are arranged to track over a wide range. The element 24 is of the phase shift multiplier type and is the subject of invention claimed in the parent Specification 41522/74 (see Division H3).
Patent GB-172874-A (GB)
Title: Improvements in bins or receptacles for sanitary purposes
IPC: B65F1/12
Filed: 1921-01-05
Abstract: 172,874. Bailey &. Son, Ltd., R., and Matthews, M. Jan. 5, 1921. Contents, delivering; specially-shaped boxes.- A sheet-metal receptacle for used sanitary towels is fitted with a hinged bottom retained in the closed position by a spring clip d, pins, or the like. To discharge the contents, the bottom is allowed to swing down into the position shown. The receptacle is preferably quadrantal in plan to enable it to be fitted in corners.
Patent GB-1201396-A (GB)
Title: Method of sensitizing photographic systems
Inventor: DUNN JOSEPH STANLEY
IPC: G03C1/09
Filed: 1968-01-03
Abstract: 1,201,396. Photographic materials. EASTMAN KODAK CO. Jan. 3, 1968 [Jan. 3, 1967 (3)], No.364/68. Heading G2C. Photographic materials, particularly silver halide emulsions and vacuum deposited silver halide layers, are sensitized by (i) a noble metal sensitizer and (ii) a labile Se compound formed by activating a non-labile Se compound. The non- labile Se compound may be activated by (i) treatment with a reducing agent, (ii) using a higher molar concentration of noble metal compound than Se compound, or (iii) heating the non-labile compound in the system after the latter has been sensitized by heating in the presence of the noble metal sensitizer. Specified non-labile compounds are KCN Se, H 2 SeO 3  and Co, Mn and Ni isoselenocyanate complexes. The reducing agents may be benzothiazolicon salts, mercaptans, disulphides, triphenylphosphine or a Pt or Au metal complex thereof, SnCl 2 , benzothiazoline and alkali-metal sulphites. The material preferably also comprises a water-soluble thiocyanate, a labile  sulphur compound as stabilizer (e.g. a thiosulphate, a thiourea, thiosemicarbazide or a thiocarbamate) and conventional additives.
Patent GB-564551-A (GB)
Title: Toilet and cosmetic preparations
IPC: A61Q1/14
Filed: 1943-01-08
Abstract: Toilet and cosmetic preparations comprise as essential ingredients methyl or ethyl oleate and a vegetable or animal oil. The mixtures may be emulsified with water.  Additional ingredients which may be added according to the purpose for which the preparation is intended include beeswax, borax, stearic acid, cetyl alcohol, glycerin, potassium hydroxide, triethanolamine stearate, spermaceti, glyceryl monostcarate.
Patent GB-710149-A (GB)
Title: Amine salts of penicillin
IPC: C07D499/00
Filed: 1952-01-08
Abstract: Penicillin salts having a prolonged action when injected are produced by forming a compound of free penicillin with an organic base of general formula <FORM:0710149/IV (b)/1> where R denotes phenyl or methyl and R1 denotes a phenyl group or a saturated linear aliphatic chain containing a methyl group as substituent and containing a total of six carbon atoms, either by double decomposition of a salt of penicillin with a salt of the base in an aqueous medium, or by direct reaction between the free penicillin acid and the free base in an organic solvent. Specified salts of penicillin are the sodium, potassium, calcium and trialkylammonium salts.  The penicillin may be penicillin G or any other penicillin.  The aqueous medium may be aqueous acetone.  Specified salts of the bases are the hydrochloride and sulphate.  The preparation of the penicillin G salts of aminodiphenylmethane and 2-amino-6-methyl heptane is described. The salts may be injected (see Group VI).ALSO:Penicillin salts having a prolonged action are injected in the form of oily suspensions, aqueous suspensions, or solutions in injectable organic solvents. The salts are produced by combining penicillin with an organic base of general formula <FORM:0710149/VI/1> or a saturated linear aliphatic chain containing a methyl group as substituent and containing a total of six carbon atoms (see Group IV(b)).  The aqueous preparations may have their viscosity increased by e.g. phenoxy ethanol, methyl cellulose or propylene glycol.
Patent GB-683735-A (GB)
Title: An improved oil pump with moving piston
IPC: F16N13/08
Filed: 1951-01-09
Abstract: 683,735. Reciprocating pumps. NEUE ARGUS GES. Jan. 9, 1951 [Feb. 27, 1950], No. 604/51. Class 102 (i). In a reciprocating pump, the barrel 1 is attached to the reservoir 14 and is fitted with a piston 3 having a collar 6 and an extension 5. When the piston is retracted, the inlet ball valve 21 rests on the extension and on the delivery stroke, the collar 6 first opens the spring-loaded delivery valve 24 and then the part 8 of the piston maintains the valve 24 open until near the end of the return stroke and thus air in the outlet 26 may rise and return to the reservoir 14.
Patent GB-836219-A (GB)
Title: Improvements in or relating to travelling wave tubes
Inventor: BURKE PETER FRANCIS CONWAY
IPC: H01J3/02
Filed: 1957-01-08
Abstract: 836,219. Travelling-wave tubes. STANDARD TELEPHONES & CABLES Ltd. Jan. 8, 1957, No. 713/57. Class 39(1). A travelling-wave tube mounting and focusing unit comprises an input and output rectangular waveguide 9, 10, Fig. 1, respectively, each apertured through their wide walls to surround respectively the input and output ends of tube 1, a focusing solenoid 15 extending between the waveguides and further solenoids 14, 16 at each end beyond the waveguides, and, at least in conjunction with the output waveguide, a pair of sheets 18, 19, Figs. 2, 3, of low reluctance magnetic material apertured to surround the tube, arranged to abut against the outside of the opposite wide waveguide walls 10 and extending beyond the width of the walls; and a pair of similarly-oriented permanent magnets 20 extending between and contacting the pair of said sheets and lying one on each narrow wall of the waveguide. The length of each magnet may be 1¢ times the wide dimension of the waveguide. The sheets 18, 19 are slotted partially at 24 to reduce transverse fields. The permanent magnets maintain a uniform field along the tube.
Patent GB-442760-A (GB)
Title: An improved method and means for the manufacture of continuous sheets of asbestos cement reinforced with wire netting
IPC: B28B23/02
Filed: 1935-01-10
Abstract: 442,760. Machines for forming webs from asbestos &c. ARENTSEN, A. H., 13, Hoflaan, Dieren, Holland. Jan. 10, 1935, No. 879. Addition to 329,853, [Class 140]. [Class 96] [See also Group V] In making continuous sheets of asbestos cement with an insertion of iron wire netting as described in the parent Specification, by applying a paste of cement and asbestos to both sides of the netting by one or more pairs of rollers between which the netting is passed, excess water being then removed and the cement rolled out by one or more further pairs of rollers, the sheet coated with the paste is passed in an upward direction to and through the rollers which remove excess water and roll out the sheet, which rollers are formed of wire netting. The asbestos cement paste is contained in a casing 1 provided with agitators 2 and with two or more pairs of horizontal wire netting rollers 3 between which the sheet 4 of wire netting passes. The rollers 3 apply the paste to the sheet 4 which next passes between guide rollers 6 and then upwardly through guide rollers 7 and rollers 8 formed of wire gauze which remove excess water and roll out the sheet. The distance between each pair of rollers 3 may be adjustable. Two or multi-ply sheets may be formed by feeding coated sheets from two or more pasting devices simultaneously to the rollers 8.
Patent GB-1021441-A (GB)
Title: Improvements in or relating to electric circuit-breakers
Inventor: LOUIS ALLETRU JEAN EDMOND
IPC: H01H73/50
Filed: 1963-01-08
Abstract: 1,021,441. Automatic circuit-breakers; protective systems. ETABLISSEMENTS BRESSON-FAILLE-MARCHAND. Jan. 8, 1963 [Jan. 8, 1962; May 24, 1962], No. 901/63. Headings H2B and H2K. A two-pole circuit-breaker comprises in each pole an arc extinguishing coil 2, 19, (Fig. 1 not shown); contacts 3, 4 and 20, 21 and one primary 13, 23 of a torroidal transformer 14 whose secondary is connected to an electromagnetic tripping device 16 such as is described in Specification 1,009,899 and also in the live pole only, an overload release coil 11 in series with a bimetal trip 12 associated with variable shunts 6, 7. Two arrangements of the shunts are possible: firstly (Fig. 1, not shown) for the 10-30 amp. range the rating'is set roughly by the tapped shunt 6 in parallel with the coil 11 and bimetal 12 and then the variable shunt 7 also in parallel therewith is adjusted so that 5 amps flows through the coil 11 when the breaker carries the rated current; alternatively (Fig. 2, not shown), for the 5-15 amp range the variable resistor 7 is in series with the coil and bimetal and is used in the same manner. In a practical embodiment (Figs. 17, 18, not shown), the breaker is enclosed in a housing having a partition 68 separating the contact structure from the remainder of the apparatus. The contact structure (Figs. 4, 5, not shown) comprises a two-part moulded block 52 pivotally mounted at 57 and operated by a pin 61 against a spring bias 58. A bar 50 resiliently mounted in the block 52 carries the live contact 4 while a spring blade 64 carries the neutral contact, each being connected in circuit by flexible conductors. The pin 61 is attached to a member 106 of the actuating mechanism (Figs. 7-9, not shown) which is held in the closed position by an overset toggle linkage 101, 105 operable by a handle 100 and a latched member 109 pivoted to the housing. Its latch blade 117 is releasable by coil 11 or by a secondary latched plunger 130 (Figs. 10-12, not shown) acting upon it, the plunger 130 being unlatched either by the plunger 126 of the tripping device 16 or by the bimetal 12 which is arranged to release a spring biased member 186 when heated by excess current; an ambient temperature compensating limb 12<SP>1</SP> supports the bimetal.
Patent GB-734006-A (GB)
Title: Improvements in or relating to devices for producing a static electrical charge
IPC: H01J47/04
Filed: 1952-01-11
Abstract: 734,006. Electrostatic generators. DORRER, W. VON. March 3, 1953 [Jan. 11, 1952], No. 921/52. Class 35. [Also in Group XXXVI] An electrostatic generator and an electrometer are combined in a plastic case. The generator comprises plastic tubes 2 containing balls of glass, plastic or other non- conductive material. When moved the balls acquire a charge which can be applied to metallic caps 3 by inverting the tubes. The electrometer comprises an annular electrode 5 fixed to the metallic caps 3 and a pointer 11 with plate electrodes 14. The pointer is carried by supports 10, 15 and webs 16 on the plastic tubes 2. When the case is inverted to charge the electrometer, a drop pin 20 connects the pointer to the electrode 5. A sand-glass 21 may be provided to time the discharge of the electrometer. In a modification, Fig. 2 (not shown), there is no sand-glass and only one tube 2.